Share This Author
Molecular interaction between COP1 and HY5 defines a regulatory switch for light control of Arabidopsis development.
The cryptochromes: blue light photoreceptors in plants and animals.
The structural, photochemical, and molecular properties of cry-DASH, plant, and animal cryptochromes are reviewed in relation to biological signaling mechanisms and common features that may contribute to better understanding the function of cryptochromaes in diverse systems including in man are uncovered.
Cryptochrome Blue Light Photoreceptors Are Activated through Interconversion of Flavin Redox States*
It is demonstrated that Arabidopsis cryptochrome activation by blue light can be inhibited by green light in vivo consistent with a change of the cofactor redox state, and results indicate that cry1 activation via blue light initiates formation of a flavosemiquinone signaling state that can be converted bygreen light to an inactive form.
The Signaling State of Arabidopsis Cryptochrome 2 Contains Flavin Semiquinone*
It is demonstrated that the active form of Cry2 contains FADH· (whereas catalytically active photolyase requires fully reduced flavin (FADH-)) and suggested that cryptochromes could represent photoreceptors using flavin redox states for signaling differently from DNA-photolyase for photorepair.
Recognition and repair of UV lesions in loop structures of duplex DNA by DASH-type cryptochrome
- R. Pokorný, T. Klar, U. Hennecke, T. Carell, A. Batschauer, L. Essen
- Biology, ChemistryProceedings of the National Academy of Sciences
- 30 December 2008
The crystal structure of Arabidopsis cryptochrome 3 with an in-situ-repaired CPD substrate in single-stranded DNA shows a binding mode similar to that of conventional DNA photolyase, and reveals that DASH cryptochromes catalyze light-driven DNA repair like conventional photolyases but lack an efficient flipping mechanism for interaction with CPD lesions within duplex DNA.
An Arabidopsis protein closely related to Synechocystis cryptochrome is targeted to organelles.
The phylogenetic analyses are consistent with an alternative explanation that the presence of cryptochromes in the plant nuclear genome is the result of dual horizontal gene transfer.
The implication of a plastid-derived factor in the transcriptional control of nuclear genes encoding the light-harvesting chlorophyll a/b protein.
- A. Batschauer, E. Moesinger, K. Kreuz, I. Dörr, K. Apel
- BiologyEuropean journal of biochemistry
- 1 February 1986
The results suggest that, in addition to phytochrome (Pfr), plastid-dependent factors are required for a continuous light-dependent transcription of nuclear genes encoding the LHCP.
Putative blue-light photoreceptors from Arabidopsis thaliana and Sinapis alba with a high degree of sequence homology to DNA photolyase contain the two photolyase cofactors but lack DNA repair…
The putative blue-light photoreceptor genes of Arabidopsis thaliana and Sinapis alba (mustard) are highly homologous to the DNA repair genes encoding DNA photolyases, and their chromophore composition suggests that the blue light photoreceptors may initiate signal transduction by a novel pathway which involves electron transfer.
Ammonia Triggers Photodamage of Photosystem II in the Cyanobacterium Synechocystis sp. Strain PCC 68031[OA]
- M. Drath, Nicole Kloft, A. Batschauer, Kay Marin, Jens F. Novak, K. Forchhammer
- Environmental Science, BiologyPlant Physiology
- 5 March 2008
Experiments with monochromatic light showed that ammonia-promoted PSII photoinhibition is executed by wavebands known to directly destroy the manganese cluster in the PSII oxygen-evolving complex, suggesting that the oxygen- Evolving complex may be a direct target for ammonia toxicity.
Plant blue-light receptors
Blue-light photoreceptors of Arabidopsis thaliana (L.) Heynh are presented and there is growing understanding of the primary mechanisms of photore ceptor activation and signal transduction.